"Contemplating is receiving." (St. John of the Cross) What we receive in prayer is the Spirit, who makes all creation new, moment by moment. It is the Spirit who rebirths us within the caves of our hearts. The case is a metaphor for this silent withdrawal, this going away to be alone, to listen, to gestate the Spirit, to rebirth ourselves. The reborn self is the child of wisdom born in solitude.
How many songs I have I cannot tell you. I keep no count of such things. There are so manyu occasions in one's life when a joy or a sorrow is felt in suich a way tthat the desire comes to sing; and so I only know that I have many songs. All my being is song, and I sing as I draw breath.... It is just a necfessary for me to sing as it is to breath.